Question

2,5(a - 3) = 0,5(a - 7).​

Answer 1

Пошаговое объяснение:

2,5(а-3)=0,5(а-7)

2,5а-7,5=0,5а-3,5

2,5а-0,5а=-3,5+7,5

2а=4

а=4/2

а=2

2,5(2-3)=0,5(2-7)

-2,5=-2,5

Answer 2

To solve the equation 2.5(a - 3) = 0.5(a - 7), you can follow these steps:

1. Distribute the constants on the left side of the equation and the right side of the equation to eliminate parentheses:

   2.5a - 7.5 = 0.5a - 3.5

2. Now, you want to isolate the variable 'a' on one side of the equation. You can do this by moving all the 'a' terms to one side and the constant terms to the other side.

   Subtract 0.5a from both sides:

   2.5a - 0.5a - 7.5 = -3.5

3. Simplify the equation by combining like terms on both sides:

   2a - 7.5 = -3.5

4. Now, add 7.5 to both sides to isolate '2a' on the left side:

   2a - 7.5 + 7.5 = -3.5 + 7.5

   2a = 4

5. Finally, divide both sides by 2 to solve for 'a':

   (2a) / 2 = 4 / 2

   a = 2

So, the solution to the equation 2.5(a - 3) = 0.5(a - 7) is a = 2.